Aircleaner hold-down bracket



April 14, 1964 J 'D RD AIRCLEANER HOLD-DOWN BRACKET Filed Aug. '7, 1961 FI G.3.

INVENTOR. JOHN DIRDA ATTO RN EYS United States Patent ()fifice I 3,129,079 Patented Apr. 14, 1964 3,129,079 AIRCLEANER HOLD-DOWN BRACKET John Dirda, Detroit, Mich., assignor to Holley Carburetor Company, Warren, Mich, a corporation of Michigan Filed Aug. 7, 1961, Ser. No. 129,678 2 Claims. (Cl. 55-505) The invention relates to aircleaners and refers more specifically to apparatus for securing an aircleaner to a carburetor which apparatus is so constructed and is so installed on the carburetor as not to obstruct the air induction passage of the carburetor.

In the past aircleaners have been provided with a mounting ring adapted to be sleeved over an aircleaner mounting lip provided on a carburetor air horn and have been held in assembly with the carburetor by means of a bolt extending through the aircleaner centrally thereof and secured to an aircleaner hold-down bracket positioned over the air induction passage of the carburetor in obstructing relation thereto. This means of securing an aircleaner to a carburetor materially effects the operation of the engine with which the carburetor is associated in that a measurable engine power loss is effected by the interference of the aircleaner hold-down bracket with the free passage of air into the carburetor air induction passage.

It is therefore one of the objects of the present invention to provide apparatus for securing an aircleaner to a carburetor which does not obstruct the air induction passage of the carburetor.

Another object is to provide apparatus for securing an aircleaner to a carburetor comprising a U-shaped aircleaner hold-down bracket adapted to be secured at the ends to opposite points on the circumference of the aircleaner mounting lip of a carburetor air born with the central portion located substantially above the mouth of the air induction passage of the carburetor in nonobstructing relation thereto and means secured to the central portion of the bracket for fastening an aircleaner mounting bolt thereto.

Another object is to provide means for securing an aircleaner to a carburetor as set forth above wherein the bracket is secured to the carburetor air horn by means of openings in the ends thereof receiving radially outwardly extending bosses formed at opposite circumferential points on the exterior surface of the air horn.

Another object is to provide means for securing an aircleaner on a carburetor as set forth above wherein the bracket is channel shaped above the air induction passage and the means for fastening the aircleaner mounting bolt to the bracket is a nut secured to the bracket centrally thereof to receive the end of the aircleaner mounting bolt.

Another object is to provide apparatus for securing an aircleaner to a carburetor without obstructing the air induction passage of the carburetor which is simple in construction, economical to manufacture and efficient in use.

Other objects and features of the invention will become apparent as the description proceeds, especially when taken in conjunction with the accompanying drawings, illustrating a preferred embodiment of the invention, wherein:

FIGURE 1 is a partial section view of an aircleaner secured to a carburetor by the aircleaner mounting apparatus of the invention.

FIGURE 2 is a partial section of the aircleaner, carburetor and aircleaner mounting apparatus shown in FIGURE 1 taken along the line 2-2 in FIGURE 1.

FIGURE 3 is a view of the structure shown in FIG- URE 2 from the direction of arrows 3-3 in FIGURE 2.

With particular reference to the figures of the drawing one embodiment of the present invention will now be disclosed.

As shown best in FIGURE 1 the invention comprises the apparatus 10 for securing an aircleaner 12 to a carburetor 14. The apparatus 10 includes the bracket 16 mounted on the carburetor 14 and the bolt 18 for securing the aircleaner 12 to the bracket 16 Bracket 16 is of such shape and is so installed on the carburetor 14 as not to obstruct the free passage of air from the aircleaner 12 into the carburetor air induction passage 20.

More specifically as shown best in FIGURES 1 and 3, the carburetor 14 includes the air horn 22 with air induction passage 20 extending therethrough. The air horn 22 includes the venturi portion 24 and the aircleaner mounting lip 26.

The aircleaner mounting lip 26 is provided with U- shaped recesses 28 in the outer surface 29 thereof at 0pposite points around the circumference thereof, as shown best in FIGURE 2. The U-shaped recesses 28 provide bosses 30 on the lip 26 for mounting the aircleaner holddown bracket 16.

Additionally the lip 26 of air horn 22 of the carburetor 14 is provided with a bevelled outer end 32. Bevelled end 32 of the lip 26 is provided to facilitate the installation of the bracket 16 on the air horn lip 26 and to aid in the positioning of the aircleaner 12 thereon.

The aircleaner hold-down bracket 16 is U-shaped as shown best in FIGURE 1 to provide an arch over the air induction passage 20 of the carburetor 14 in installation. U-shaped bracket 16 is provided with enlarged flat outer ends 34 having openings 36 therein through which the bosses 30 extend with the bracket 16 installed on the carburetor 14. Thus the openings 36 and bosses 30 cooperate to secure the bracket 16 to the carburetor 14 against vertical and angular displacement of the bracket relative to the carburetor.

Bracket 16 is further provided with a flange 38 on each side thereof extending inwardly of the U-shaped bracket to increase the strength of the bracket. Nut 40 is secured centrally to the bracket 16 as by spinning or staking. Nut 40 is adapted to threadedly engage the end of bolt 18 extending through the opening 42 in the upper housing part 44 of the aircleaner 12 to secure the aircleaner 12 in assembly on the carburetor 14.

The aircleaner 12 comprises upper and lower exterior housing members 44 and 46 respectively. The lower exterior housing member 46 is provided with the aircleaner mounting ring 48 adapted to sleeve over the aircleaner mounting lip portion 26 of the carburetor air horn 22 in assembly, as shown best in FIGURE 1. The aircleaner 12 further includes the annular filter element 50 including the filter material 52 enclosed between the upper and lower annular plates 54 and 56, the annular screen 58 and a similar annular screen (not shown) at the outer periphery of the filter element 50.

In installation of the aircleaner 12 on the carburetor 14 the aircleaner hold-down bracket 16 is first installed on the lip 26 of the carburetor air horn 22 by springing the ends 34 of the resilient bracket 16 radially outwardly with the help of the bevelled end 32 of the lip 26 to secure the ends 34 of the bracket 16 in the recesses 28 with the bosses 30 extending through the openings 36. The aircleaner 12 is then sleeved over the lip 26 as shown in FIGURE 1 whereby the ends 34 of the bracket 16 are locked in position against radial displacement by the aircleaner mounting ring 48. Aircleaner 12 is then secured in assembly with carburetor 14 by threading the bolt 18 through the opening 42 in the aircleaner upper housing part 44 and engaging the bolt 18 with the nut 40.

It will be evident from an inspection of the figures that the apparatus 10 for mounting an aircleaner on a carburetor in accordance with the invention offers practically no interference to air flow through the induction passage 20 of the carburetor 14 and therefore does not adversely affect the operation of an engine used in conjunction with the carburetor 14. Further it will be noted that the apparatus 10 is extremely easy to install and remove as well as being simple in construction, economical to manufacture and efficient in securing the aircleaner 12 to the carburetor 14.

The drawings and the foregoing specification constitute a description of the improved aircleaner mounting apparatus in such full, clear, concise and exact terms as to enable any person skilled in the art to practice the invention, the scope of which is indicated by the appended claims.

What I claim as my invention is:

1. An air horn for a carburetor defining an air induction passage and including an annular aircleaner mounting lip surrounding the air induction passage having an axially outer, radially outer, bevelled edge therearound,

a pair of oppositely disposed upwardly opening U-shaped recesses in the aircleaner mounting lip forming oppositely disposed aircleaner hold-down bracket mounting bosses on the aircleaner mounting lip, a U-shaped aircleaner hold-down bracket formed of a substantially flat strip of resilient material including substantially flat enlarged end portions each having an opening therethrough and adapted to fit within said oppositely disposed U-shaped recess with the mounting bosses extending through the openings, the central portion of said bracket extending :over and in spaced relation to the air induction passage, a downwardly extending rib on each side of the central ,portion of the aircleaner hold-down bracket for providing rigidity, the center of said aircleaner hold-down bracket being enlarged transversely of the bracket, a threaded nut fixedly secured in the enlarged center of said aircleaner hold-down bracket, an aircleaner including an aircleaner mounting ring positioned over said air induction passage and aircleaner hold-down bracket with the aircleaner mounting ring sleeved over the aircleaner mounting lip for locking the ends of the aircleaner holddown bracket in position over the mounting bosses, a central opening in the aircleaner aligned with the nut on the aircleaner hold-down bracket and a headed bolt extending through said central portion in the aircleaner and engaged with the threaded nut for securing the aircleaner to the air horn in cooperation with said aircleaner hold-down bracket.

2. An aircleaner hold-down bracket comprising a U- shaped member formed of a strip of substantially fiat resilient material including enlarged end portions having boss receiving openings therein, a reinforcing rib on each side of the central portion thereof extending inwardly of the U-shaped bracket, a transversely enlarged portion at the center of the bracket and a threaded nut secured to the U-shaped bracket centrally against rotation relative thereto.

References Cited in the file of this patent UNITED STATES PATENTS 1,027,579 Wright May 28, 1912 2,672,212 Scutt Mar. 16, 1954 2,707,575 Wheatley May 3, 1955 2,710,177 Young et a1. June 7, 1955 2,836,257 Muller May 27, 1958 

1. AN AIR HORN FOR A CARBURETOR DEFINING AN AIR INDUCTION PASSAGE AND INCLUDING ANANNULAR AIRCLEANER MOUNTING LIP SURROUNDING THE AIR INDUCTION PASSAGE HAVING AN AXIALLY OUTER, RADIALLY OUTER, BEVELLED EDGE THEREAROUND, A PAIR OF OPPOSITELY DISPOSED UPWARDLY OPENING U-SHAPED RECESSES IN THE AIRCLEANER MOUNTING LIP FORMING OPPOSITELY DISPOSED AIRCLEANER HOLD-DOWN BRACKET MOUNTING BOSSES ON THE AIRCLEANER MOUNTING LIP, A U-SHAPED AIRCLEANER HOLD-DOWN BRACKET FORMED OF A SUBSTANTIALLY FLAT STRIP OF RESILIENT MATERIAL INCLUDING SUBSTNATIALLY FLAT ENLARGED END PORTIONS EACH HAVING AN OPENING THERETHROUGH AND ADAPTED TO FIT WITHIN SAID OPPOSITELY DISPOSED U-SHAPED RECESS WITH THE MOUNTING BOSSES EXTENDING THROUGH THE OPENINGS, THE CENTRAL PORTION OF SAID BRACKET EXTENDING OVER AND IN SPACED RELATION TO THE AIR INDUCTION PASSAGE, A DOWNWARDLY EXTENDING RIB ON EACH SIDE OF THE CENTRAL PORTION OF THE AIRCLEANER HOLD-DOWN BRACKET FOR PROVIDING RIGIDITY, THE CENTER OF SAID AIRCLEANER HOLD-DOWN BRACKET BEING ENLARGED TRANSVERSELY OF THE BRACKET, A THREADED NUT FIXEDLY SECURED IN THE ENLARGED CENTER OF SAID AIRCLEANER HOLD-DOWN BRACKET, AN AIRCLEANER INCLUDING AN AIRCLEANER MOUNTING RING POSITIONED OVER SAID AIR 